HackingTechnologyHealthcareInformationVulnerability ExploitData ExfiltratedData EncryptedCustomer Data InvolvedDelayed DiscoveryIdentity (basic)Government IDHealth (basic)PHIHighContained

Welltok, Inc.

bd_2fa5485914c25161 · schema v1 · pii pii-v1

Severity

High

Discovered

Jul 26, 2023

Filed

Dec 15, 2023

To disclose

20 weeks

Affected

48,257state residents only

Linked

2 filings

Confidence

69%

Welltok, Inc. issued a supplemental notice to the Washington State Attorney General regarding a data event involving its MOVEit Transfer server. An unknown actor exploited software vulnerabilities to access the server on May 30, 2023, and exfiltrated data including names, DOBs, SSNs, and PHI. Welltok discovered the potential compromise on July 26, 2023. Approximately 48,257 Washington residents were notified starting December 13, 2023. Welltok provided credit monitoring via Experian.

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Leak gap clock✗ Leak >180d20 weeks discovery → filing

Incident timeline

undetected · 57 days

discovery → filing · 20 weeks / 142 days

May 30, 2023

Begins

Jul 26, 2023

Discovered

Dec 15, 2023

Filed

vs. sector median

+2 wks slower

This filing is one of 2 about the same incident.View merged incident

A leak claim by bianlian about this victim predates this filing by 220 days.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

HHS OCRbd_97bf9bf4880c835a2023-12-21 · +6dVerified

Name: Welltok, Inc.
norm: welltok
Domain: humana.com

Name: Welltok, Inc.
norm: welltok
Domain: humana.com
Industry: TechnologyllmHealthcarellm

Discovered: Jul 26, 2023
Breach occurred: May 30, 2023
Undetected for: 57 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 13, 2023
Affected individuals: 48,257state-resident count only
Data types: Identity (basic)Government IDHealth (basic)PHI
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Filed supplemental notice with Washington State Office of the Attorney General
Initial access: exploit_public_facing

During the incident: Launched an additional investigation with the assistance of third-party cybersecurity specialists
Provided access to credit monitoring services for twelve (12) to twenty-four (24) months through Experian
Provided impacted individuals with guidance on how to better protect against identity theft and fraud
Provided information on how to place fraud alerts and credit freezes on their credit files
Changes made: Reviewing and enhancing existing policies and procedures related to data privacy
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 20 weeks(142 days from discovery to filing)
Compliance flags: Leak >180dWA AG >30d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Washington State AGDec 15 · first · this page

HHS OCR+6d

Pattern: first filing Dec 15 (WA), last Dec 21 (KY) — a 6-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://agportal-s3bucket.s3.amazonaws.com/databreach/BreachM16506.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 15, 2023
Raw hash: 62b7ab8e2b9c01b8d3c99e1a6528029daf53e51305d28aa056f70a451d8cfe9b

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityWelltok, Inc.

Victim entityWelltok, Inc.

Incidentdiscovered Jul 26, 2023

Stated responseLaunched an additional investigation with the assistance of third-party cybersecurity specialists

ComplianceLeak >180d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com